If you are on your own then a water meter is the answer. If you have about ten teenagers living with you, all having 20 showers a day and supplying you with x amount of washing then you will not gain anything. It all depends on the amount of water you use. I went over to a meter and as smow says it was the best thing I ever did. Halved my bill immediately and I am hoping it will be even less with the care I take not to use too much water. I still have a shower each day, by the way, so not saving there, but I only put the washing machine on when it is full and so on.